Yehuda Katz is a member of the Ember.jsRuby on Rails and jQuery core teams; his 9-to-5 home is at the startup he founded, Tilde Inc. There he works on Skylight, the smart profiler for Rails, and does Ember.js consulting. He’s best known for his open source work, which includes projects like ThorHandlebars and Janus. He travels the world doing open source evangelism and web standards work. He blogs at and can be found on Twitter as @wycats.